What is the point of Twitter?

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Twitter is a social communication tool where people broadcast short messages. These messages, called tweets, are limited to 140 characters in length, and can be sent from certain web-based tools, desktop applications, and mobile devices. Messages are often about what someone is doing, where they are, what they are thinking or reading or watching, and so on. It's possible to include links to web pages, images, and other media in a tweet. As a Twitter user, you select which other people you wish to follow; when you follow someone, their tweets show up in a list known as your Twitter stream. Anyone who chooses to follow you will see your tweets in their stream.
Twitter has evolved quickly as an effective way to communicate up-to-the minute news and resources via web links, announcements, and opinions.
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